Improvement in rolling-mill stands



UNITED` STATES ATnNT FrIcn.

WILLIAM F. BURDEN, OF TROY, NEW YORK.

IMPROVEMENT lN ROLLING-MILL STANDS, 81,0.

Speciticatiou forming part of Letters Patent No.. 37,27LL dated January 6, 1863.

T0 all whom it may concern:

Be it known that I, WILLIAM F. BURDEN, of Troy,in the county ot' Rensselaer and State of New York, have invented certain new and useful Improvements in Roll-Stands and Garriages or Bearings; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure 1 is an end elevation of my invention; Fig. 2, a plan or top View of the same. Fig. 3 is a section in the line x m of Fig. 2; Fig. 4, a section in the line y y of Fig. 2; Fig. 5, a section in the line z a of Fig. 2; and Fig. 6 is an inverted plan.

Similar letters of reference in the several figures indicate corresponding parts.

The nature of my invention consists in so arranging an upper and a lower roller, in combination `with an intermediate roller, that either the upper roller or lower roller, or both, may be adjusted independently of the intermediate roller, and so that the intermediate roller shall at all times maintain its permanent position with respect to the upper and lower rollers. Heretofore the usual means of adjusting rolls, when used in triplets, to each other has been by stopping the train, and with a bar raising and separating the rolls and placing packing between the brass and carriages or bearing-boxes. This has been tedious, and by no means accurate. Besides, that Inode, whenever the iron or other metal passed between the middle and top or middle and bottom rolls, the pressure was increased upon thejournals of all the rolls. My invention obviates these inconveniences and ditiiculties, as the middle roll is held independent- 1y and the top and bottom rolls are made adjustable to it, as hereinafter described.

To enable others skilled in the art to make and use my invention, I will proceed to describe the construction and operation of the same with reference tothe drawings.

A Adesignate the housings in which therollers are arranged; B C D, the three rolls. Of these the middle one, C, has its journals supported between bearings a a', which are properly tted to the journals, and also snugly bctween the uprights of the housings. The lower bearing-pieces, u, u., are arched on their under sides and rest upon abutments b b ot' said uprights, and thus they have no chance to descend. also arched, but on their upper side, and abut against vertical screws E E, which extend down through the capping-plates c o of the housings. The screws keep the bearing-pieces a a down upon the journals of the middle roll, C, while the abutments b b keep the lower bearing-pieces, a a, up against the same. Thus the middle roller cannot move up or down unless the screws E E are slackened. The top roller, B, has its journals suspended in the arch of the bearing-pieces a a.' by means of narrower bearing pieces d d, which are attached to the lower ends of vertical screws G G, said screws extending Vdown through yokes e and the capping-plates c o of the housings. The upper bearings, f j', of the roller B are fitted loosely in the lcapping-plates c c, and held down by larger screws H H, which also extend down through the yokes e and the cappingplates c c,"as shown. The screws G G are furnished with nuts at their upper ends, and are fitted to slide up through the yokes e e, while the screws H H are made square on their up per ends, and are fitted to turn in the yoke and to descend with it. With this arrangement the screws G G support the top roller and its carriages or bearingsindependently of the middle roller, while the screws H H keep it down to its work. The lower roller, D, is hung on sliding bearings I I, which are narrow enough to extend up into the arch of the lower bearing-pieces, ay a, of the middle roller, G. These bearings I I are fitted between the uprights of the housings, and rest on vertical screws J J, which extend up through the baseplates L h ofthe housings. On the lower end of each ofthe screws a narrow spur-wheel, K,

is keyed, and into this wheel a long pinion, L, gears, said pinion being on a turnkey-shaft, M, as shown. Yith this arrangement the lower roller, D, has an independent adjust- Inent toward or from the middle roller, U, for

if the pinions L L are turned, the spur-wheels and screws are caused to revolve, and during the revolution the screws and spur-wheels rise or descend, accordingly as the adjustment is made, carrying the bearings of the lower roller with them.

My arrangement, as a whole, affords great convenience Ior'adjusting'the upper and lower rollers, and that, too, with accuracy, as the po- The upper bearing-pieces, a a', are

sition of thc middle roller does not change its relative position.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a rolling-mill which has its middle roller xed and its top and bottom rollers adjustable, the manner, substantially as described, of applying` the screws E E for the purpose of holding down the middle-roll bearing a.

2. In a rolling-mill which has the middle roll fixed and its top and bottom rollers adjustable, the arrangement of the screws H, G, and E with the top-roller bearings df and upper bearing, a', of the middle roller, substantially in the manner described.

3. The combination of the bearings I, screws J spur-Wheels K, pinions L, and key-shafts M with the bottom rollers, substantially in the manner described.

4.. In a mningmiu which has its middle VYM. F. BURDEN. Witnesses JNO. L. G. KNOX, JOHN L. ARTS. 

